Unknown Caterpillar

Observation - Unknown Caterpillar. Description: Large single caterpillar, crossing grass path on Limestone crag. About 6-7cm long with ~1cm diameter. Body covered by fine hairs, much of the length of which was black, but the tips were gold or light orange in colour. Caterpillar wrapped itself into tigh

Large single caterpillar, crossing grass path on Limestone crag. About 6-7cm long with ~1cm diameter. Body covered by fine hairs, much of the length of which was black, but the tips were gold or light orange in colour. Caterpillar wrapped itself into tight whirl, so couldn't see any features on head